1. If you enabled SAMBA RECYCLE BIN and remove file from SAMBA connection, please refer to following FAQ to check file been moved to recycle bin.http://thecus.kayako.com/default_import/Knowledgebase/Article/View/246/0/how-to-remove-files-from-os5-x64-samba-recycle-bin

2. If you does enable SAMBA RECYCLE or remove file from other protocol, please don't use or write file on to this RAID volume, and contact data rescue lab for help.